// 生成随机的唯一字符串
function createRandomWords(length = 15) {
    const SEEDCHARS = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz';
    let maxPost = SEEDCHARS.length, random_string = '';
    if (length < 5)
        length = 5;
    for (let i = length; i > 0; i--) {
        random_string += SEEDCHARS.charAt(Math.floor(Math.random() * maxPost));
    }
    if (length <= 10) {
        return random_string;
    }
    else {
        return random_string.substr(0, length - 5) + (Date.now() + '').substr(8, 5);
    }
}
// 截取文件后面的后缀
function clipFileExts(filename, keepDot = false) {
    let filenameArr = filename.split('.');
    if (filenameArr.length >= 2) {
        let ext = filenameArr[filenameArr.length - 1];
        return (keepDot ? '.' : '') + ext;
    }
    return false;
}
export { createRandomWords, clipFileExts };
export default {
    createRandomWords,
    clipFileExts
};
